Put energy near the bond line.
Localized heating supports the material that must bond to the incoming bead, especially when layer time or geometry cools the interface too far.
Localized thermal control for extrusion AM
Improve layer adhesion without losing part stability.
LEAM helps operators manage the thermal process window in large-format additive manufacturing: enough heat where layers need to bond, less uncontrolled heat where geometry needs to stay stable.
Strength context
The problem is measurable, and the improvement can be too.
- -50-75% Why it matters LFAM parts can show 50-75% lower mechanical performance in Z-direction than X/Y direction.
- +457% Unreinforced LMPAEK Published trials show Z-direction tensile-strength increase from surface temperature 300°C to surface temperature 340°C.
- +70% Reinforced LMPAEK Published trials show Z-direction tensile-strength increase from uncontrolled printing to surface temperature 340°C.
Strength figures: SAMPE Europe 2025 paper, NLR and LEAM co-authorship, "Effect of Interlayer Temperature Control on Interlayer Strength for LFAM of High Performance Thermoplastics." Tested LMPAEK conditions, not a universal part-performance guarantee.
Problem
Large-format extrusion AM fails when the interface is too cold to bond or the part stays too hot to stay stable.
Long layer times can leave the previous bead too cold for strong interlayer formation. Short paths, thick walls, and high material flow can do the opposite, accumulating heat until slumping, sagging, distortion, or unstable geometry limits production.
That balance is difficult to predict because it changes with geometry, bead size, layer time, material flow, and ambient conditions. When the process window is not visible, industrial applications become harder to qualify and scale.
Most teams respond with print-speed changes, pauses, chamber heat, or manual temperature tuning. Those workarounds can help, but they make process repeatability harder to document and scale.
Method
Heat where bonding happens. Control what the broader part retains.
LEAM targets the deposition interface instead of relying only on global thermal conditions. The system combines localized heating, sensing, machine feedback, and process logging so operators can make the thermal process window more observable.
Manage retained heat.
Broader part temperature still matters. LEAM is framed around the balance between adhesion, heat accumulation, and stable geometry.
Make the process visible.
Temperature feedback and process data give technical teams a clearer basis for tuning, review, and qualification discussions.
DEMEX system
DEMEX is the retrofit system that brings LEAM thermal control to existing extrusion AM platforms.
DEMEX provides the field-installable hardware layer around the printer, robot, pilot cell, or production workflow: cabinet, end effector, routing hardware, cooling interfaces, installation support, and machine integration.
Applications
Applications with proven production value and focused R&D potential.
LEAM is most relevant where large-format 3D printing is limited by weak layer bonding, heat accumulation, slumping, distortion, or difficult repeatability. Start from the part, material, process window, and target outcome.
Marine
Large structures, long tool paths, and maritime application development where thermal stability constrains the process.
Oil and gas
Large polymer components, seals, rings, and thick-wall geometries that need application-specific material and access checks.
Molds and tooling
Large-format tooling, plugs, molds, fixtures, and production aids where bonding, geometry, and repeatability matter.
Aerospace end-use parts
End-use part development and composite overprinting where process data, repeatability, and controlled thermal history support evaluation.
Rail
Relevant for inventory reduction and replacement parts when injection-molding-grade materials and comparable performance targets can be evaluated for a specific component.
Automotive
Relevant where repeatability and productivity must hold under changing ambient, cell, or production conditions.
Application fit check
Check whether your process is a thermal-control candidate.
The fit checker helps summarize process type, print path, material constraints, symptoms, throughput, wall thickness, speed, target outcome, and timeline. It stores nothing on the server.
Use the generated summary in an email or paste it into the booking notes for a technical fit call.
Support network
Proudly supported by:
LEAM has been supported by public startup funding, incubation programs, venture-building networks, awards, and engineering-software programs as the technology moved from research toward industrial application work.
Resources
Want to know more?
You can keep reading, run the fit checker, or contact us directly. No complete specification is needed to start a conversation.
Contact
Let's figure out your application together.
You do not need a complete specification to start. Share whatever you already know about the machine, material, part, or production bottleneck, and we can work through the rest together.